Endeavour's final trekA look back at the space shuttle's farewell tour as it traveled from Florida to its new home in California

See this year's top shots in astronomyScience editor Alan Boyle's blog: Feast your eyes on the Whirlpool Galaxy, an icy starscape and other celestial wonders from the 2012 Astronomy Photographer of the Year competition.

Neil Armstrong's ashes buried at seaScience editor Alan Boyle's blog: The cremated remains of Apollo 11 astronaut Neil Armstrong, the first man to set foot on the moon, were committed to the Atlantic Ocean.

Saturn changes color with the seasonsScience editor Alan Boyle's blog: Saturn's shades of blue and butterscotch are changing along with the planet's seasons, as illustrated by true-color photos from the Cassini orbiter.

John Glenn through the yearsFrom his accomplishments as a Marine Corps pilot, through his tenure with NASA and his foray into politics, take a look at the life of John Glenn, 50 years after the historic 1962 flight that made him the first American in space.